fatal error: gnu/stubs-32.h: No such file

[Bruce Korb <bruce dot korb at gmail dot com>]

> make[5]: Entering directory `/u/gnu/proj/gcc-bld/x86_64-unknown-linux-gnu/32/libgcc'
> # If this is the top-level multilib, build all the other
> # multilibs.
> DEFINES='' HEADERS='../../../../gcc-svn/libgcc/config/i386/value-unwind.h' \
>         ../../../../gcc-svn/libgcc/mkheader.sh > tmp-libgcc_tm.h
> /bin/sh ../../../../gcc-svn/libgcc/../move-if-change tmp-libgcc_tm.h libgcc_tm.h
> echo timestamp > libgcc_tm.stamp
> /u/gnu/proj/gcc-bld/./gcc/xgcc -B/u/gnu/proj/gcc-bld/./gcc/ -B/u/gnu/inst/x86_64-unknown-linux-gnu/bin/ -B/u/gnu/inst/x86_64-unknown-linux-gnu/lib/ -isystem /u/gnu/inst/x86_64-unknown-linux-gnu/include -isystem /u/gnu/inst/x86_64-unknown-linux-gnu/sys-include    -g -O2 -m32 -O2  -g -O2 -DIN_GCC   -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include   -fpic -mlong-double-80 -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector   -fpic -mlong-double-80 -I. -I. -I../../.././gcc -I../../../../gcc-svn/libgcc -I../../../../gcc-svn/libgcc/. -I../../../../gcc-svn/libgcc/../gcc -I../../../../gcc-svn/libgcc/../include -I../../../../gcc-svn/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS  -DUSE_TLS -o _muldi3.o -MT _muldi3.o -MD -MP -MF _muldi3.dep -DL_muldi3 -c ../../../../gcc-svn/libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS
> In file included from /usr/include/features.h:399:0,
>                  from /usr/include/stdio.h:27,
>                  from ../../../../gcc-svn/libgcc/../gcc/tsystem.h:87,
>                  from ../../../../gcc-svn/libgcc/libgcc2.c:27:
> /usr/include/gnu/stubs.h:7:27: fatal error: gnu/stubs-32.h: No such file or directory
>  # include <gnu/stubs-32.h>
>                            ^
> compilation terminated.
> make[5]: *** [_muldi3.o] Error 1
> make[5]: Leaving directory `/u/gnu/proj/gcc-bld/x86_64-unknown-linux-gnu/32/libgcc'
> make[4]: *** [multi-do] Error 1

The above was preceded by:

> $ ../gcc-svn/configure --enable-languages=c,c++,java,objc,go --prefix=/u/gnu/inst
> configure: loading site script /usr/share/site/x86_64-unknown-linux-gnu
> checking build system type... x86_64-unknown-linux-gnu
> [...]
> checking for version 0.11 of ISL... no
>  'c++' language required by 'go' in stage 1; enabling
> The following languages will be built: c,c++,go,java,lto,objc
> *** This configuration is not supported in the following subdirectories:
>      gnattools target-libada target-libgfortran
>     (Any other directories should still work fine.)
> checking for default BUILD_CONFIG... bootstrap-debug
> checking for bison... bison -y
> [...]
> checking whether to enable maintainer-specific portions of Makefiles... no
> configure: creating ./config.status
> config.status: creating Makefile
> $ make

Why is it that configure worked but stubs-32.h was not found?
Googling leads me to:
> You're missing the 32 bit libc dev package:

but the configure step should detect that and object before
this otherwise obscure message comes up.  Since one has to find
and select this stuff from an extensive list of packages
every time there is a new distribution, it is easy to overlook....

Thanks!